OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 24 shown for “Swedish post horn” — 64 records examined, 32 dropped by the rights gate.
Archives queried 2026-09-01 00:51 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Snaphaunce Hunting Rifle
Jonas Schertiger the Younger · dated 1722
Swedish post horn
Artist not stated in the record · 1800-1899
Panel with Byzantine Ivory Carving of the Crucifixion
Artist not stated in the record · 10th century (ivory); late 11th century (setting)
Swedish mailbox
Artist not stated in the record · mid 20th-early 21st Century
Pocket Post Horn in G
Giuseppe Pelitti · ca. 1880
Austrian post horn replica
Artist not stated in the record · 1866
Coach Horn in C
Artist not stated in the record · ca. 1825–89
The Post Boy newspaper
Artist not stated in the record · March 8-10, 1719/20
Cornet à Pistons in B-flat
Courtois frères · 1833
3c Sweden-Finnish Tercentenary plate proof
Bureau of Engraving and Printing
Ballock Knife
Artist not stated in the record · 16th century
5c Swedish Pioneer plate proof
Bureau of Engraving and Printing · May 26, 1948
Trompe de chasse "Dauphine"
Cretien workshop, Paris (c.1690 – post 1737) · ca. 1700
Folded Letter
Artist not stated in the record · 1836
Close-Helmet for the Tournament on Foot
Artist not stated in the record · ca. 1640–50
Microtus ochrogaster similis
Artist not stated in the record · 11 Apr ----
Post Horn in B-flat
Artist not stated in the record · 19th century
Castilleja applegatei Fernald
Artist not stated in the record · 4 Jul 1965
Post Horn in F
Artist not stated in the record · ca. 1860–80
Tray for dresser set owned by Lena Horne
Artist not stated in the record · mid 20th Century
The Curious Little Girl
Camille Corot · 1860–64
Chicago, Illinois Medallion Owney Tag
Artist not stated in the record · 1893
Oboe
Franz Lauter · ca. 1855–60
Packera dubia (Spreng.) Trock & Mabb.
Artist not stated in the record · 17 Apr 1993
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 50 matched · 24 examined · 5 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 31597 matched · 40 examined · 27 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-01 00:51 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.